LuYAP∶Ce闪烁晶体阵列研究
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摘要
铝酸钇镥(LuYAP)∶Ce晶体具有衰减时间短,密度大,光产额高及不潮解等优点。采用该晶体制作的闪烁晶体阵列,能快速获得皮秒级正电子湮灭的精确信息。该文报道了一种LuYAP∶Ce闪烁晶体阵列的制作方法,将提拉法制备的LuYAP∶Ce晶体经切割并运用化学机械抛光法处理后,最终利用填充材料制作了晶体阵列。在X线光机上开展了阵列的发光均匀性测试,测得发光不均匀性为14.8%。结果表明,LuYAP∶Ce晶体满足使用要求。
LuYAP∶Ce crystal has the advantages of short decay time, high density, high light yield and non-deliquescence. The scintillation crystal arrays fabricated with this crystal can quickly obtain the accurate information of positron annihilation at picosecond level. A fabrication method of LuYAP∶Ce scintillating crystal array is presented in this paper. The LuYAP∶Ce crystal prepared by the Czochralski method is cut and polished by the chemical mechanical polishing, and a crystal array is finally fabricated by using the filling material. The luminance uniformity test of the array is carried out on the X-ray machine, and the luminance inhomogeneity is measured to be 14.8%, which satisfies the application requirements.
LuYAP∶Ce crystal has the advantages of short decay time, high density, high light yield and non-deliquescence. The scintillation crystal arrays fabricated with this crystal can quickly obtain the accurate information of positron annihilation at picosecond level. A fabrication method of LuYAP∶Ce scintillating crystal array is presented in this paper. The LuYAP∶Ce crystal prepared by the Czochralski method is cut and polished by the chemical mechanical polishing, and a crystal array is finally fabricated by using the filling material. The luminance uniformity test of the array is carried out on the X-ray machine, and the luminance inhomogeneity is measured to be 14.8%, which satisfies the application requirements.
引文
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[4] 石自彬,岑伟,徐扬,等.高镥组分LuYAP∶Ce闪烁晶体生长及性能研究[J].压电与声光,2016,38(3):413-419.SHI Zhibin,CEN Wei,XU Yang,et al.Growth and characterization of high-lutetium component LuYAP∶Ce single crystalss[J].Piezoelectrics & Acoustooptics,2016,38(3):4013-419.
[5] 李德辉,徐扬,尹红,等.LSO晶体及阵列加工技术研究[J].压电与声光,2013,35(3):408-411.LI Dehui,XU Yang,YIN Hong,et al.Study on LSO crystal and its array finishing technology[J].Piezoelectrics & Acoustooptics, 2013,35(3):408-411.
[6] 尹红,徐扬,李德辉,等.小动物PET成像用LYSO 闪烁晶体阵列研究[J].压电与声光,2014,36(3):406-411.YIN Hong,XU Yang,LI Dehui,et al.Study on LYSO scintillation crysta array for small animal PET applications[J].Piezoelectrics & Acoustooptics,2014,36(3):406-411.
[2] VALAIS I,DAVID S,MICHAIL C,et al.Comparative study of luminescence properties of LuYAP∶Ce and LYSO:Ce single-crystal scintillators for use in medical imaging[J].Nuclear Instruments and Methods in Physics Research A,2007,580:614-616.
[3] 丁洪林.核辐射探测器[M].哈尔滨:哈尔滨工程大学出版社,2010.
[4] 石自彬,岑伟,徐扬,等.高镥组分LuYAP∶Ce闪烁晶体生长及性能研究[J].压电与声光,2016,38(3):413-419.SHI Zhibin,CEN Wei,XU Yang,et al.Growth and characterization of high-lutetium component LuYAP∶Ce single crystalss[J].Piezoelectrics & Acoustooptics,2016,38(3):4013-419.
[5] 李德辉,徐扬,尹红,等.LSO晶体及阵列加工技术研究[J].压电与声光,2013,35(3):408-411.LI Dehui,XU Yang,YIN Hong,et al.Study on LSO crystal and its array finishing technology[J].Piezoelectrics & Acoustooptics, 2013,35(3):408-411.
[6] 尹红,徐扬,李德辉,等.小动物PET成像用LYSO 闪烁晶体阵列研究[J].压电与声光,2014,36(3):406-411.YIN Hong,XU Yang,LI Dehui,et al.Study on LYSO scintillation crysta array for small animal PET applications[J].Piezoelectrics & Acoustooptics,2014,36(3):406-411.